Sulfate Ion Transfer Model of Recycled Concrete Based on the Characterization of Attached Mortar
GUAN Bowen1,2, ZHANG Shuowen1,2, WU Jiayu1,2,3,*, WANG Faping4, CHEN Xiaokun5
1 School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China 2 Engineering Research Center of Transportation Pavement Materials, Ministry of Education, Chang'an University, Xi'an 710061, China 3 School of Civil and Transportation Engineering, Ningbo University of Technology, Ningbo 315016, Zhejiang, China 4 Qinghai Communications Holding Group Co., Ltd., Xining 810000, China 5 Qinghai Provincial Traffic Control Construction Engineering Group Co., Ltd., Xining 810000, China
Abstract: The existing model of recycled concrete did not fully consider the characteristics of attached mortar, resulting in the lack of the new mortar-aggregate interface transition zone in the model, and the sulfate transfer model was inconsistent with the actual situation. In this work, the volume of the three-dimensional aggregate was converted into a two-dimensional plane circle according to the Valerian formula, and the aggregates are divided into two parts, the attached mortar and the aggregate according to the characteristics of the attached mortar measured by the image analysis method. Using Monte Carlo equations, the divided recycled aggregates were randomly put into the concrete system, and a six-phase digital model of recycled concrete was established. Through the process of determining the cross-sectional area of recycled aggregate and establishing the recycled aggregate database, a method for expressing the adhesion characteristics of the attached mortar of recycled aggregate in the six-phase concrete digital model was proposed. Based on Fick’s second law, combined with the analysis of the influence of porosity on the diffusion coefficient of each phase in recycled concrete, the diffusion coefficient equation of each phase in recycled concrete was proposed. The two-dimensional visualization of six-phase recycled concrete was realized by finite element software, and the sulfate ion transport model of six-phase recycled concrete was established. Comparing the experimental test value with the model calculation value, it is concluded that the test result is in good agreement with the calculation result. The theoretical calculation result is consistent with the change of the ion transmission depth measured in the experiment. The sulfate transport model of recycled concrete based on the adhesion characteristics of attached mortar is reasonable.
关博文, 张硕文, 吴佳育, 王发平, 陈晓堃. 基于残余砂浆附着特征的再生混凝土硫酸盐传输模型[J]. 材料导报, 2024, 38(15): 23040046-8.
GUAN Bowen, ZHANG Shuowen, WU Jiayu, WANG Faping, CHEN Xiaokun. Sulfate Ion Transfer Model of Recycled Concrete Based on the Characterization of Attached Mortar. Materials Reports, 2024, 38(15): 23040046-8.
1 Wang S, Lyu L H, Zhang B L, et al. Research of Environment Sciences, 2021, 34(9), 1 (in Chinese). 王深, 吕连宏, 张保留, 等. 环境科学研究, 2021, 34(9), 1. 2 Zhao G W, Guo M Z, Cui J F, et al. Construction and Building Materials, 2021, 294(3), 123560. 3 Zou D J, Qin S S, Liu T J, et al. Cement and Concrete Research, 2021, 139, 106284. 4 Zhen H D, Poon C S. Materials & Design, 2014, 58, 19 5 Hu Z, Mao L X, Liu Q F. Bulletin of the Chinese Ceramic Society, 2020, 39(8), 2425 (in Chinese). 胡志, 毛丽璇, 刘清风. 硅酸盐通报, 2020, 39(8), 2425. 6 Liu Q F, Easterbrook D, Yang J, et al. Engineering Structures, 2015, 86, 122. 7 Shen X H, Liu Q F, Hu Z, et al. Ocean Engineering, 2019, 189, 106350. 8 Mao L X, Hu Z, Xia J, et al. Composite Structures, 2019, 207, 176. 9 Caré S, Hervé E. Transport in Porous Media, 2004, 56(2), 135. 10 Qiao H X, Qiao G B, Lu C G. Journal of Huazhong University of Science and Technology(Natural Science Edition), 2021, 49(3), 119 (in Chinese). 乔宏霞, 乔国斌, 路承功. 华中科技大学学报(自然科学版), 2021, 49(3), 119. 11 Guan B W, Yang T, Wu J Y, et al. Journal of Building Materials, 2018, 21(2), 304 (in Chinese). 关博文, 杨涛, 吴佳育, 等. 建筑材料学报, 2018, 21(2), 304. 12 Guan B W. Study on the fatigue damage of cement concrete subjected to sulfate corrosion and alternating stresses. Ph. D. Thesis, Chang'an University, China, 2012 (in Chinese). 关博文. 交变荷载与硫酸盐腐蚀作用下水泥混凝土疲劳损伤机制. 博士学位论文, 长安大学, 2012. 13 Guan B W, Liu J N, Wu J Y, et al. Bulletin of the Chinese Ceramic Society, 2020, 39(10), 3169 (in Chinese). 关博文, 刘佳楠, 吴佳育, 等. 硅酸盐通报, 2020, 39(10), 3169. 14 Yang T, Guan B W, Liu G Q, et al. Advances in Concrete Construction, 2019, 8(1), 55. 15 Yu D M, Guan B W, He R, et al. Construction and Building Materials, 2016, 115, 478. 16 Zhang Q Q, Xu F, Liu W Q, et al. Concrete, 2017(1), 39 (in Chinese). 张清清, 徐锋, 刘伟庆, 等. 混凝土, 2017(1), 39. 17 Li Y. Modeling and analysis of concrete with irregular aggregate. Master’s Thesis, Hefei University of Technology, China, 2017 (in Chinese). 李阳. 含非规则骨料的混凝土细观建模与分析. 硕士学位论文, 合肥工业大学, 2017. 18 Liao K X, Zhang Y P, Zhang W P, et al. Construction and Building Materials, 2020, 260, 119902. 19 Min H G, Sui L L, Xing F, et al. Construction and Building Materials, 2019, 216, 365. 20 Niu L C. Numerical simulation study on diffusion reaction law of sulfate ion in concrete under coupling a ction of load and sulfate attack. Master’s Thesis, Nanjing University of Technology, China, 2012 (in Chinese). 牛立聪. 荷载与硫酸盐侵蚀耦合作用下硫酸根离子在混凝土中扩散反应规律的数值模拟研究. 硕士学位论文, 南京理工大学, 2012. 21 Aitcin P C. Canadian Journal of Civil Engineering, 1986, 13(4), 499. 22 Jiang J Y, Sun G W, Wang C H. Construction and Building Materials, 2013, 39, 134. 23 Cao Y B. Study on multi-interface concrete microstructure of recycled concrete. Master’s Thesis, Qingdao University of Technology, China, 2016 (in Chinese). 曹瑜斌. 再生混凝土多重界面显微结构研究. 硕士学位论文, 青岛理工大学, 2016. 24 Xiao J Y, Li W G, Sun Z H, et al. Cement and Concrete Composites, 2013, 37, 276. 25 Yu Y, Lin L. Construction and Building Materials, 2020, 264, 120620. 26 German Institute for Standardisation. Determination of specific surface area of solids by gas adsorption using the method of brunauer, emmett and teller (DIN 66131), 2013. 27 Guan B W, Wu J Y, Chen H X, et al. China Journal of Highway and Transport, 2021, 34(10), 155 (in Chinese). 关博文, 吴佳育, 陈华鑫, 等. 中国公路学报, 2021, 34(10), 155.
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2024, Vol. 38 
